Global Patent Index - EP 3913709 A4

EP 3913709 A4 20221012 - NEGATIVE ELECTRODE ACTIVE SUBSTANCE FOR NON-AQUEOUS ELECTROLYTE SECONDARY CELL, NON-AQUEOUS ELECTROLYTE SECONDARY CELL, AND METHOD FOR MANUFACTURING NEGATIVE ELECTRODE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY CELL

Title (en)

NEGATIVE ELECTRODE ACTIVE SUBSTANCE FOR NON-AQUEOUS ELECTROLYTE SECONDARY CELL, NON-AQUEOUS ELECTROLYTE SECONDARY CELL, AND METHOD FOR MANUFACTURING NEGATIVE ELECTRODE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY CELL

Title (de)

AKTIVE SUBSTANZ FÜR NEGATIVE ELEKTRODE FÜR SEKUNDÄRE ZELLE MIT WASSERFREIEM ELEKTROLYT, SEKUNDÄRE ZELLE MIT WASSERFREIEM ELEKTROLYT UND VERFAHREN ZUR HERSTELLUNG VON MATERIAL FÜR NEGATIVE ELEKTRODE FÜR SEKUNDÄRE ZELLE MIT WASSERFREIEM ELEKTROLYT

Title (fr)

SUBSTANCE ACTIVE D'ÉLECTRODE NÉGATIVE POUR ACCUMULATEUR À ÉLECTROLYTE NON AQUEUX, ACCUMULATEUR À ÉLECTROLYTE NON AQUEUX, ET PROCÉDÉ DE FABRICATION DE SUBSTANCE D'ÉLECTRODE NÉGATIVE POUR ACCUMULATEUR À ÉLECTROLYTE NON AQUEUX

Publication

EP 3913709 A4 20221012 (EN)

Application

EP 19909913 A 20191226

Priority

  • JP 2019005012 A 20190116
  • JP 2019051049 W 20191226

Abstract (en)

[origin: EP3913709A1] The inventive negative electrode active material for a non-aqueous electrolyte secondary battery contains negative electrode active material particles which include silicon compound (SiO<sub>x</sub>: 0.5≤x≤1.6) particles. The negative electrode active material particles are at least partially coated with a carbon material, contain one or more selected from Li<sub>2</sub>SiO<sub>3</sub> and Li<sub>2</sub>Si<sub>2</sub>O<sub>5</sub>, and satisfy Ib/Ia≤4.8 and Ic/Ia≤6.0 in an X-ray diffraction measurement using a Cu-Kα line. Ia represents an intensity of a peak around 2θ=28.4° attributable to Si obtained by the X-ray diffraction. Ib represents a peak intensity of a peak attributable to Li<sub>2</sub>SiO<sub>3</sub> obtained by the X-ray diffraction. Ic represents a peak intensity of a peak attributable to Li<sub>2</sub>Si<sub>2</sub>O<sub>5</sub> obtained by the X-ray diffraction. Thus, the present invention provides a negative electrode active material for a non-aqueous electrolyte secondary battery, which is stable over a long period even in an aqueous slurry and enables high capacity, favorable cycle characteristics and first-time efficiency.

IPC 8 full level

H01M 4/48 (2010.01); C01B 33/113 (2006.01); C01B 33/32 (2006.01); H01M 4/131 (2010.01); H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 4/58 (2010.01); H01M 4/587 (2010.01); H01M 10/052 (2010.01)

CPC (source: EP KR US)

C01B 33/113 (2013.01 - EP KR US); C01B 33/32 (2013.01 - EP KR); H01M 4/131 (2013.01 - EP US); H01M 4/133 (2013.01 - US); H01M 4/1391 (2013.01 - US); H01M 4/1393 (2013.01 - US); H01M 4/366 (2013.01 - EP KR); H01M 4/386 (2013.01 - US); H01M 4/48 (2013.01 - EP); H01M 4/483 (2013.01 - KR); H01M 4/5825 (2013.01 - KR); H01M 4/587 (2013.01 - EP); H01M 4/62 (2013.01 - KR); H01M 4/625 (2013.01 - KR); H01M 10/052 (2013.01 - EP); H01M 10/0525 (2013.01 - US); C01P 2002/72 (2013.01 - KR); C01P 2002/74 (2013.01 - KR US); C01P 2002/86 (2013.01 - KR); H01M 10/0525 (2013.01 - KR); H01M 2004/027 (2013.01 - US); Y02E 60/10 (2013.01 - EP)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

EP 3913709 A1 20211124; EP 3913709 A4 20221012; CN 113316855 A 20210827; JP 2020113495 A 20200727; JP 7098543 B2 20220711; KR 20210110609 A 20210908; TW 202032839 A 20200901; US 2022069297 A1 20220303; WO 2020149133 A1 20200723

DOCDB simple family (application)

EP 19909913 A 20191226; CN 201980088922 A 20191226; JP 2019005012 A 20190116; JP 2019051049 W 20191226; KR 20217021388 A 20191226; TW 109100553 A 20200108; US 201917421522 A 20191226